Datasheet

ST7538Q Auxiliary analog and digital functions
41/44
Figure 25. Application schematic example with coupling tranformer.
ST7538Q
PG
REGOK
WD
RxD
RX/TX
REG/DATA
TxD
CLR/T
CD/PD
BU
TOUT
MCLK
RSTO
ZCOUT
ATOP2 PAVCC
21 22
XIN
27
XOUT
26
ZCIN
16
Vsense
CL ATOP1
19 23
ATO24
29
13
UART/SPI
30
TEST2
35
TEST1
RAI
32
RxFO31
10
DVdd
28
AVdd
33
VDC
C_PLUS
38
C_MINUS37 C_OUT40
14 36 42 1 3 4 5 7 8 9
11
12
15
43
2
DVSS GND
6
17
N.C.
DVSS
1820
PAVSS
SGND
25
34
N.C.
39
N.C.
GND
41
44
N.C.
HOST
CONTROLLER
AC LINE
AC/DC
Converter
Zero Crossing
Transmission
Synchronization
No External Components
for POWER LINE DRIVER
SINGLE SUPPY
5V Supply
for Host Controller
Clock & Reset for
Host Controller
5 Lines
Serial Interface
Voltage
Regulation
&
Current
Protection
LOAD
R1 R2
RCL
C1
D03IN1412A
Mains
Coupling
reference
circuit